A macromolecular assembly directed ceramic aerogel monolith material,Journal of Materials Chemistry C

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A macromolecular assembly directed ceramic aerogel monolith material
Journal of Materials Chemistry C ( IF 5.7 ) Pub Date : 2020-06-26 , DOI: 10.1039/d0tc02481c
Ruizhe Yang _{1,

2,

3,

4,

5} , Jieyu Wang _{2,

3,

4,

5,

6} , Lu An _{1,

2,

3,

4,

5} , Donald Petit _{1,

2,

3,

4,

5} , Jason N. Armstrong _{1,

2,

3,

4,

5} , Yuzi Liu _{5,

7,

8} , Yulong Huang _{1,

2,

3,

4,

5} , Yong Hu _{1,

2,

3,

4,

5} , Zefan Shao _{1,

2,

3,

4,

5} , Shenqiang Ren _{1,

2,

3,

4,

5}

Affiliation

Ceramic aerogels exhibit remarkable thermal insulation for energy efficient building applications, while it is indispensable to understand their nanoporous structure evolution to control their thermal regulation performance. In this study, we design and synthesize a lightweight porous silica aerogel monolithic material, and demonstrate its thermal insulation performance regulated by the morphology of porous nanostructures controlled by surfactant induced self-assembly. The micelle networks and in situ gas bubble formation guide the formation of uniform pores in the as-synthesized monolith, which shows superior thermal and acoustic insulation and robust mechanical stability with a thermal conductivity of 0.032 W m⁻¹ K⁻¹, a soundproof performance improvement by 17% at a frequency of 800 Hz, and a 1.3 MPa compressive strength with a Young's modulus of 15 MPa. These findings provide a new route to manufacture low-cost aerogel monolithic insulation materials for energy efficient building applications.

中文翻译：

大分子组装定向陶瓷气凝胶整体材料

陶瓷气凝胶在节能建筑应用中具有出色的隔热性能，而了解其纳米孔结构的演变以控制其热调节性能则必不可少。在这项研究中，我们设计和合成了一种轻质的多孔二氧化硅气凝胶整体材料，并证明了其保温性能受表面活性剂诱导的自组装控制的多孔纳米结构的形态调节。胶束网络和原位气泡形成指导在合成的整料中形成均匀的孔，这显示出优异的隔热和隔音性能以及强大的机械稳定性，导热系数为0.032 W m ^-1 K ^-1，在800 Hz频率下的隔音性能提高了17％，杨氏模量为15 MPa的压缩强度为1.3 MPa。这些发现为制造用于节能建筑应用的低成本气凝胶整体式隔热材料提供了一条新途径。

更新日期：2020-08-06

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